LM317P [STMICROELECTRONICS]
1.2V TO 37V VOLTAGE REGULATOR; 1.2V至37V电压稳压器
| 型号： | LM317P |
| 厂家： | 
ST |
| 描述： | 1.2V TO 37V VOLTAGE REGULATOR |
| 文件： | 总11页 (文件大小：102K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LM117/217
LM317
1.2V TO 37V VOLTAGE REGULATOR
■
■
■
■
OUTPUT VOLTAGERANGE : 1.2 TO 37V
OUTPUT CURRENT IN EXCESS OF 1.5A
0.1% LINE AND LOAD REGULATION
FLOATINGOPERATION FOR HIGH
VOLTAGES
■
COMPLETE SERIESOF PROTECTIONS :
CURRENT LIMITING, THERMAL
SHUTDOWN AND SOA CONTROL
DESCRIPTION
The LM117/LM217/LM317 are
monolithic
TO-3
D2PAK
integrated circuit in TO-220, ISOWATT220, TO-3
and D2PAK packages intended for use as
positive adjustable voltage regulators.
They are designed to supply more than 1.5A of
load current with an output voltage adjustable
over a 1.2 to 37V range.
The nominal output voltage is selected by means
of only a resistive divider, making the device
exceptionally easy to use and eliminating the
stocking of many fixed regulators.
TO-220
ISOWATT220
ABSOLUTE MAXIMUM RATING
Symbol
Parameter
Value
Unit
Vi-o
Input-output Differential Voltage
40
V
IO
Output Current
Intenrally Limited
Top
Operating Junction Temperature for: LM117
LM217
LM317
-55 to 150
-25 to 150
0 to 125
oC
oC
oC
Ptot
Tstg
Power Dissipation
Internally Limited
- 65 to 150
Storage Temperature
oC
THERMAL DATA
Symbol
Parameter
TO-3
TO-220 ISOWATT220 D2PAK
Unit
Rthj-case Thermal Resistance Junction-case
Rthj-amb Thermal Resistance Junction-ambient
Max
Max
4
35
3
50
4
60
3
62.5
oC/W
oC/W
1/11
November 1999
LM117/217/317
CONNECTION DIAGRAM AND ORDERING NUMBERS
(top view)
TO-220
ISOWATT220
D2PAK
TO-3
Type
TO-3
TO-220
ISOWATT220
D2PAK
LM117
LM217
LM317
LM117K
LM217K
LM317K
LM217T
LM317T
LM217D2T
LM317D2T
LM317P
SCHEMATIC DIAGRAM
2/11
LM117/217/317
BASIC ADJUSTABLE REGULATOR
ELECTRICAL CHARACTERISTICS (Vi - Vo = 5 V, Io = 500 mA, IMAX = 1.5A and PMAX = 20W, unless
otherwise specified)
Symbol
Parameter
LineRegulation
Load Regulation
Test Conditions
LM117/LM217
LM317
Unit
Min. Typ. Max. Min. Typ. Max.
o
Vi - Vo = 3 to 40 V
Tj = 25 C
0.01 0.02
0.02 0.05
0.01 0.04 %/V
0.02 0.07 %/V
∆Vo
o
Tj = 25 C
5
15
50
0.3
1
5
25
70
mV
mV
%
∆Vo
Vo ≤ 5V
Io = 10 mA to IMAX
20
20
o
Tj = 25 C
0.1
0.3
50
0.1
0.3
50
0.5
1.5
100
5
Vo 5V
≥
Io = 10 mA to IMAX
%
IADJ
Adjustment Pin Current
100
5
A
A
µ
µ
Adjustment Pin Current Vi - Vo = 2.5to 40 V
Io = 10 mA to IMAX
0.2
0.2
I
∆
ADJ
VREF Reference Voltage
Vi - Vo = 2.5to 40 V
1.2 1.25 1.3
1.2 1.25 1.3
V
(between pin 3 and pin Io = 10 mA to IMAX
1)
PD
P
MAX
≤
Output Voltage
1
1
%
∆V
o
Temperature Stability
V
o
Io(min) Minimum Load Current Vi - Vo = 40 V
3.5
2.2
5
3.5
2.2
10
mA
A
Io(max) Maximum Load
Current
1.5
1.5
Vi - Vo 15 V
PD < PMAX
≤
Vi - Vo = 40 V
PD < PMAX
0.4
0.4
A
T = 25 oC
j
eN
Output Noise Voltage B = 10Hz to 10KHz
0.003
0.003
%
(percentance of VO)
T = 25 oC
j
SVR Supply Voltage
Rejection (*)
T = 25 oC
f = 120 Hz
CADJ=0
65
80
65
80
dB
dB
j
66
66
CADJ=10 F
µ
(*) CADJ is connected between pin 1 and ground.
Note:
(1) Unless otherwise specified the above specs, apply over the following conditions : LM 117 Tj = – 55 to 150°C;
LM 217 Tj = – 25 to 150°C ; LM 317 Tj = 0 to 125°C.
3/11
LM117/217/317
Figure 1 :
Figure 2 :
Dropout Voltage vs. Junction
Output Current vs. Input-output
Differential Voltage.
Temperature.
Figure 3 : Reference Voltage vs. Junction
Figure 4 : Basic Adjustable Regulator.
APPLICATION INFORMATION
The LM117/217/317 provides an internal
reference voltage of 1.25V between the output
and adjustments terminals. This is used to set a
constant current flow across an external resistor
divider (see fig. 4), giving an output voltage VO of:
voltage, supplies of very high voltage with respect
to ground can be regulated as long as the
maximum input-to-output differential is not
exceeded. Furthermore, programmable regulator
are easily obtainable and, by connecting a fixed
resistor between the adjustment and output, the
device can be used as a precision current
regulator.
In order to optimise the load regulation, the
current set resistor R1 (see fig. 4) should be tied
as close as possible to the regulator, while the
ground terminal of R2 should be near the ground
of the load to provide remote ground sensing.
R2
R1
VO = VREF (1 +
R2
) + IADJ
The device was designed to minimize the term
IADJ (100µA max) and to maintain it very constant
with line and load changes. Usually, the error
term IADJ R2 can be neglected. To obtain the
previous requirement, all the regulator quiescent
current is returned to the output terminal,
imposing a minimum load current condition. If the
load is insufficient, the output voltage will rise.
Performance may be improved with added
capacitanceas follow:
An input bypass capacitor of 0.1µF
Since the LM117/217317 is a floating regulator
and ”sees” only the input-to-output differential
An adjustment terminal to ground 10µF capacitor
4/11
LM117/217/317
to improve the ripple rejection of about 15 dB
(CADJ).
practice to add protection diodes, as shown in
fig.5.
D1 protect the device against input short circuit,
while D2 protect against output short circuit for
capacitancedischarging.
An 1µF tantalium (or 25µFAluminium electrolitic)
capacitor on the output to improve transient
response.
In additional to external capacitors, it is good
Figure 5 : Voltage Regulator with Protection Diodes.
D1 protect the device against input short circuit, while D2 protects against output short circuit for capacitors discharging
Figure 6 : Slow Turn-on 15V Regulator.
Figure 7 : Current Regulator.
V
1.25V
R
1
ref
I
=
+ I
≈
ADJ
o
R
1
5/11
LM117/217/317
Figure 8 :
Figure 9 :
Digitally Selected Outputs
5V Electronic Shut-down Regulator
(R2 sets maximum Vo)
Figure 10 : BatteryCharger (12V)
Figure 11 : CurrentLimited 6V Charger
* RS sets output impedance of charger
R2
R1
Use of RS allows low charging rates with fully charged battery.
Zo = RS (1 +
)
*
R3 sets peak current (0.6A for 1 ).
Ω
** C1 recommended to filter out input transients.
6/11
LM117/217/317
TO-3 (R) MECHANICAL DATA
mm
inch
TYP.
0.460
DIM.
MIN.
TYP.
MAX.
MIN.
MAX.
A
B
C
D
E
G
N
P
R
U
V
11.7
0.96
1.10
1.70
8.7
0.037
0.043
0.066
0.342
0.787
20.0
10.9
16.9
0.429
0.665
26.2
4.09
1.031
0.161
1.555
3.88
0.152
39.50
30.10
1.185
A
D
P
C
G
R
P003N
7/11
LM117/217/317
TO-220 MECHANICAL DATA
mm
inch
TYP.
DIM.
MIN.
4.40
1.23
2.40
TYP.
MAX.
4.60
1.32
2.72
MIN.
0.173
0.048
0.094
MAX.
0.181
0.051
0.107
A
C
D
D1
E
1.27
0.050
0.49
0.61
1.14
1.14
4.95
2.4
0.70
0.88
1.70
1.70
5.15
2.7
0.019
0.024
0.044
0.044
0.194
0.094
0.393
0.027
0.034
0.067
0.067
0.203
0.106
0.409
F
F1
F2
G
G1
H2
L2
L4
L5
L6
L7
L9
DIA.
10.0
10.40
16.4
0.645
13.0
2.65
15.25
6.2
14.0
2.95
15.75
6.6
0.511
0.104
0.600
0.244
0.137
0.147
0.551
0.116
0.620
0.260
0.154
0.151
3.5
3.93
3.85
3.75
L2
Dia.
L5
L9
L7
L6
L4
P011C
8/11
LM117/217/317
ISOWATT220 MECHANICAL DATA
mm
inch
TYP.
DIM.
MIN.
4.4
TYP.
MAX.
4.6
2.7
2.75
0.7
1
MIN.
0.173
0.098
0.098
0.015
0.030
0.045
0.045
0.195
0.094
0.393
MAX.
0.181
0.106
0.108
0.027
0.039
0.067
0.067
0.204
0.106
0.409
A
B
2.5
D
2.5
E
0.4
F
0.75
1.15
1.15
4.95
2.4
F1
F2
G
1.7
1.7
5.2
2.7
10.4
G1
H
10
L2
L3
L4
L6
L7
Ø
16
0.630
28.6
9.8
15.9
9
30.6
10.6
16.4
9.3
1.126
0.385
0.626
0.354
0.118
1.204
0.417
0.645
0.366
0.126
3
3.2
L3
L6
L7
¯
1 2 3
L4
L2
P011G
9/11
LM117/217/317
2
TO-263 (D PAK) MECHANICAL DATA
mm
inch
TYP.
DIM.
MIN.
4.4
TYP.
MAX.
4.6
MIN.
0.173
0.098
0.027
0.044
0.017
0.048
0.352
0.393
0.192
0.590
0.050
0.055
MAX.
0.181
0.106
0.036
0.067
0.023
0.053
0.368
0.409
0.208
0.624
0.055
0.068
A
A1
B
2.49
0.7
2.69
0.93
1.7
B2
C
1.14
0.45
1.23
8.95
10
0.6
C2
D
1.36
9.35
10.4
5.28
15.85
1.4
E
G
4.88
15
L
L2
L3
1.27
1.4
1.75
D
A
C
C2
DETAIL”A”
DETAIL”A”
A1
B
B2
E
G
L3
L2
L
P011P6/F
10/11
LM117/217/317
Information furnished isbelieved to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is
granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are
subject to change without notice. Thispublication supersedes and replaces all information previously supplied. STMicroelectronics products
are not authorized for use as critical components in lifesupport devices or systems withoutexpress written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics
1999 STMicroelectronics – Printed in Italy – All Rights Reserved
STMicroelectronics GROUP OF COMPANIES
Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan- Malaysia - Malta - Morocco
Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A.
http://www.st.com
.
11/11
相关型号：
©2020 ICPDF网 联系我们和版权申明